class Point():

    def __init__(self, x, y, color = 'black'):
        self.__x = x
        self.__y = y
        self.__color = color

    @property
    def x(self):
        return self.x
    @property
    def y(self):
        return self.y
    @property
    def color(self):
        return self.color


points = list()

for i in range(1, 2001, 2):
    if (i != 3):
        points.append(Point(i, i))
    else:
        points.append(Point(i, i, 'yellow'))
